mufattaḥatan
(will be) opened
N – accusative feminine indefinite (form II) passive participle
Root Link: ف ت ح
lahumu
for them
P – prefixed preposition lām + PRON – 3rd person masculine plural personal pronoun humu
Root Link: ل
l-abwābu
the gates
DET – determiner prefix al + N – nominative masculine plural noun
Root Link: ب و ب